Iraq withdrawal is mostly done

Pentagon and military officials report that the withdrawal of most U.S. military forces from Iraq's major cities has been completed a day ahead of tomorrow's deadline.

According to the officials, within the past 30 days, 30 U.S. military bases have either been closed down or handed over to Iraqi security forces. A total of 150 bases have been shut down or turned over to Iraqis in the past nine months.

Despite the withdrawal, many U.S. military forces will remain in the cities, embedded with Iraqi forces as advisers. They would also act as liaison officers who would be able to summon a U.S. military rapid reaction force if needed -- or also call in U.S. military air strikes. Those remaining in the cities would also include intelligence officers.

Neither the military or Pentagon could provide a specific number of U.S. forces left behind.